Scarlet and Gunner are trying to determine which of them traveled at a greater speed when coming back from their vacation. Scarlet maintained a constant speed throughout her 7-hour journey. Her speed can be modeled by 455 = mx, where x is the time in hours, and m is the rate at which Scarlet traveled.

Based upon these two models, which person traveled at a greater speed? Explain your reasoning by using a written description of each scenario. Be sure to include the unit rates in your explanation.
Gunner's traveling time is displayed by this graph.

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.